How to extract a severely corroded injector on a 2012 X5 E70 with the N55 engine?

Today’s project has been how do extract a severely corroded injector, buried deep in the cylinder head, without damaging the cylinder head and the surrounding areas on a 2012, BMW X5 E70 with the BMW X5 E70?

We pay attention, as it is part of our service package to report, as we did in this case, the importance of the firewall partitions can’t be ignored.

The plastic partitions will break over time from heat degradation and will allow washer fluid, snow, and rain to flood the top of the engine. You can clearly see the pink washer fluid residue on the casting cavity around the injector .

A simple injector replacement became a major undertaking as the washer fluid, which is corrosive fused the injector into the cylinder head.

You can compare the broken partitions at front to the new ones in the box, it’s actually made out of 3 pieces.

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This silly looking but rather important components can cost plenty by damaging vital engine components inadvertently. Took me 4 hours to weld and extract the damaged injector tip.

You can compare them on the picture, the way it should look and the welded corroded tip after hours of struggle.

Proper timely maintenance cost less on the long term. Lucky owner the cylinder head didn’t need to be removed and replaced.